561553616500444 has 6 divisors (see below), whose sum is σ = 982718828875784. Its totient is φ = 280776808250220.

The previous prime is 561553616500343. The next prime is 561553616500453. The reversal of 561553616500444 is 444005616355165.

It is a super-2 number, since 2×561553616500444² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70194202062552 + ... + 70194202062559.

Almost surely, 2^{561553616500444} is an apocalyptic number.

It is an amenable number.

561553616500444 is a deficient number, since it is larger than the sum of its proper divisors (421165212375340).

561553616500444 is a wasteful number, since it uses less digits than its factorization.

561553616500444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140388404125115 (or 140388404125113 counting only the distinct ones).

The product of its (nonzero) digits is 25920000, while the sum is 55.

The spelling of 561553616500444 in words is "five hundred sixty-one trillion, five hundred fifty-three billion, six hundred sixteen million, five hundred thousand, four hundred forty-four".